Extremism
Extremism is "the race or state of being extreme" or "the advocacy of extreme measures or views".
The term is primarily used in the political or religious sense, to refer to an ideology that is considered by a speaker or by some implied shared up social consensus to be far external the mainstream attitudes of society. It can also be used in an economic context. The term may be used pejoratively by opposing groups, but is also used in academic as well as journalistic circles, in a purely descriptive in addition to non-condemning sense.
Extremists' views are typically contrasted with those of Islamic political movements, the distinction between extremist and moderate Muslims is commonly stressed.
Political agendas perceived as extremist often include those from the far-left politics or far-right politics as alive as radicalism, reactionism, fundamentalism and fanaticism.